05-06-2008 09:37 PM - edited 03-05-2019 10:47 PM
Hi,
We are using 3750 switch as core switch, and we are getting an error message VLAN flapping between two switch ports can any one advicxe the cause of this.
05-06-2008 10:04 PM
Hi
this is related to STP loop,check for the uplink or redundant connections.
Thanks
Mahmood
05-06-2008 11:44 PM
HI,
I identified the loop and shut down the PC. Its was generating the below error. What exactly is the cause of the error. There was a laptop connected on that port.
FastEthernet0/14 relearning 18 addrs per min
May 7 04:53:44.589 GMT: %RTD-1-ADDR_FLAP: FastEthernet0/14 relearning 27 addrs per min
05-07-2008 12:11 AM
Hi
This is the error message when there is a loop in the network.Usually a port learns one address if it is access port.if it is trunk port it will have many address but it not learn so fast.
Thanks
Mahmood
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